Why is localhost slow?

Question

local server

Chrome recently stopped working with .dev domains, and I used them for development. It's a pity, but as it is.
Here is a list of domains recommended for development:

.test
.example
.invalid
.localhost

Purely for the development version, I chose the least of the evils - .localhost. But compared to .dev it works with a delay. Those. on .dev the page was given in 200 ms, on .localhost 1200 ms. On any domains, the loss is approximately 1 sec.
Cleaned dns caches in Windows and chrome caches, what could be the problem?

Answer 1

The problem resolved itself. The delay did not become 0, but not a second either.
And curl -o /dev/null -s -w %{time_total} example.localhost always issued without delay.